Crops ›› 2022, Vol. 38 ›› Issue (6): 118-123.doi: 10.16035/j.issn.1001-7283.2022.06.017

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Effects of Reducing Fertilizer Application Models on Wheat Yield and Nutrient Use Efficiencies in Rice-Wheat Cropping System

Xiong Yousheng1(), Xiong Hanfeng2(), Guo Yanlong3, Wang Haisheng4, Liu Wei1, Yan Yuxiang3, Xie Yuanyuan1, Zhou Jianxiong1, Yang Lijun1   

  1. 1Plant Protection and Soil Fertilizer Institute, Hubei Academy of Agricultural Sciences, Wuhan 430064, Hubei, China
    2Ezhou Vocational University, Ezhou 436000, Hubei, China
    3Ezhou Institute of Agricultural Sciences, Ezhou 436000, Hubei, China
    4Wuhan Agricultural Testing Center, Wuhan 430023, Hubei, China
  • Received:2021-05-25 Revised:2022-09-18 Online:2022-12-15 Published:2022-12-21
  • Contact: Xiong Hanfeng E-mail:yshxiong@126.com;xhfeng987@163.com

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Abstract:

In order to explore the effects of different reducing fertilizer application modes on wheat yield, nutrient use efficiency in rice-wheat cropping system, and to provide theoretical basis for achieving high efficient application of chemical fertilizer and its zero increase in China, a 3-year field positioning experiment of rice-wheat cropping system was carried out. Six treatments were set including no fertilizer (T1), conventional chemical fertilization (T2), combination of organic manure and chemical fertilizer (T3), reducing 20% chemical fertilizer plus nitrogen synergist (T4), reducing 20% chemical phosphorus fertilizer plus phosphorus activator (T5), and reducing 20% nitrogen and 20% phosphorus plus nitrogen synergist and phosphorus activator (T6). The results showed that compared with T2 treatment, the effects of fertilizer reduction on wheat yield was not significant. The average production investment ratio of three years of T4 treatment was 3.96%, higher than that of T2 treatment, and that of T5 and T6 treatments were 59.21% and 56.24% lower than that of T2 treatment; T4 treatment increased nitrogen absorption efficiency, nitrogen use efficiency and potassium use efficiency by 9.22%-20.70%, 7.01%-28.67%, and 4.69%-7.67%, respectively. T5 treatment could increase the total phosphorus uptake by 15.53%, the range of phosphorus absorption efficiency, partial productivity and use efficiency were increased by 21.43%-46.67%, 12.18%-52.06%, and 3.77%-4.52%, respectively. T6 treatment increased nitrogen absorption efficiency, phosphorus partial productivity, and potassium utilization efficiency by 5.67%-19.40%, 10.88%-43.43%, and 7.38%-12.97%, respectively. T3 treatment had no significant effects on the absorption and utilization of nitrogen and phosphorus, and significantly reduced the partial productivity of potassium. The comprehensive results showed that T6 treatment could stabilize wheat yield and coordinate crop nutrient absorption, but the economic benefit was low due to high cost of phosphorus activator.

Key words: Wheat yield, Economic benefit, Nutrient use efficiency, Rice-wheat cropping system, Reduced fertilizer application

Table 1

Different fertilizer application models for rice-wheat cropping experiment kg/hm2"

处理
Treatment		 化肥Chemical fertilizer 有机肥
Organic fertilizer		 氮增效剂
Nitrogen synergist		 磷素活化剂
Phosphorus activator
N P2O5 K2O
T1 0.0 0.0 0.0 0 0.00 0.0
T2 180.0 105.0 120.0 0 0.00 0.0
T3 180.0 105.0 120.0 1500 0.00 0.0
T4 144.0 105.0 120.0 1500 1.67 0.0
T5 180.0 84.0 120.0 1500 0.00 225.0
T6 144.0 84.0 120.0 1500 1.67 225.0

Fig.1

Effects of different treatments on wheat yield in rice-wheat cropping system in 2018-2020"

Table 2

Economic benefit analysis of different fertilization modes in 2018-2020"

处理
Treatment		 投入
（元/hm2）
Input
(yuan//hm2)		 产出（元/hm2）
Output
(yuan/hm2)		 产投比
Output-
input ratio		 3年平均
3-year
average
2018 2019 2020 2018 2019 2020
T2 1682.86 12 809 5644 7034 7.61 3.35 4.18 5.05
T3 1794.25 11 120 6062 7058 6.20 3.38 3.93 4.50
T4 1648.99 12 177 6589 7186 7.38 4.00 4.36 5.25
T5 3952.37 11 014 6154 7280 2.79 1.56 1.84 2.06
T6 3807.02 11 655 6483 7082 3.06 1.70 1.86 2.21

Fig.2

Effects of different treatments on nitrogen uptake and utilization of wheat in rice-wheat cropping system in 2018-2020"

Fig.3

Effects of different treatments on phosphorus uptake and utilization of wheat in rice-wheat cropping system in 2018-2020"

Fig.4

Effects of different treatments on potassium uptake and utilization of wheat in rice-wheat cropping system in 2018-2020"

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